Published 5:49 am, Tuesday, July 12, 2016

Synopsis...A 29.2 inch low pressure system over central manitoba will move into northern ontario tonight and wednesday. A trough extending from this low and averaging 29.7 inches will cross lake superior today into this evening. A secondary trough at 29.6 inches will move over the upper great lakes wednesday as the associated low lifts toward hudson bay. High pressure of 30.1 inches building from the central plains thursday into the upper great lakes thursday night will then persist through the weekend.

Wednesday...South winds 10 to 20 knots becoming southwest 15 to 25 knots by mid afternoon. A chance of showers and a slight chance of thunderstorms by mid afternoon. Waves building to 1 to 3 feet...Then subsiding to calm to 2 feet.

Wednesday night...West winds 10 to 20 knots. A chance of showers through midnight. Waves building to 1 to 3 feet...Then subsiding to calm to 2 feet.

Rest of today...South winds 15 to 25 knots diminishing to 10 to 20 knots by mid afternoon. Patchy fog by late morning. A chance of showers and thunderstorms. Waves 2 to 4 feet subsiding to calm to 2 feet.

Tonight...South winds 10 to 20 knots veering southwest after midnight. A slight chance of showers and thunderstorms through midnight. Areas of fog after midnight. Waves building to 1 to 3 feet...Then subsiding to calm to 2 feet.

Wednesday...South winds 10 to 20 knots increasing to 15 to 25 knots by mid afternoon. Patchy fog. A chance of showers and thunderstorms by mid afternoon. Waves building to 2 to 4 feet... Then subsiding to 1 to 3 feet.

Wednesday night...Southwest winds 10 to 20 knots veering west after midnight. A chance of thunderstorms through midnight. A chance of showers. Waves subsiding to calm to 2 feet...Then building to 1 to 3 feet.